Abstract
In this research, new algorithm for evaluation of real contact area (RCA) from direct observed image under high load condition was proposed. At first, experimental equipment which was suitable for high load condition was developed. It was available for observation by both optical and ultrasonic method. Then the RCA was obtained from optically observed image by edge detection technique. After that the validity of the optical method was checked by comparing with another system based on analysis of ultrasonic reflection analysis under the same contact conditions. As a result, it has been found that the optical method and the ultrasonic method have similar tendency and close values in low load condition. From the experimental result, it was proved that proposed algorithm was effective and appropriate.
